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+/* java.lang.reflect.Constructor - reflection of Java constructors
+   Copyright (C) 1998, 2001 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+ 
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.lang.reflect;
+
+import java.util.Arrays;
+
+/**
+ * The Constructor class represents a constructor of a class. It also allows
+ * dynamic creation of an object, via reflection. Invocation on Constructor
+ * objects knows how to do widening conversions, but throws
+ * {@link IllegalArgumentException} if a narrowing conversion would be
+ * necessary. You can query for information on this Constructor regardless
+ * of location, but construction access may be limited by Java language
+ * access controls. If you can't do it in the compiler, you can't normally
+ * do it here either.<p>
+ *
+ * <B>Note:</B> This class returns and accepts types as Classes, even
+ * primitive types; there are Class types defined that represent each
+ * different primitive type.  They are <code>java.lang.Boolean.TYPE,
+ * java.lang.Byte.TYPE,</code>, also available as <code>boolean.class,
+ * byte.class</code>, etc.  These are not to be confused with the
+ * classes <code>java.lang.Boolean, java.lang.Byte</code>, etc., which are
+ * real classes.<p>
+ *
+ * Also note that this is not a serializable class.  It is entirely feasible
+ * to make it serializable using the Externalizable interface, but this is
+ * on Sun, not me.
+ *
+ * @author John Keiser
+ * @author Eric Blake <ebb9@email.byu.edu>
+ * @see Member
+ * @see Class
+ * @see java.lang.Class#getConstructor(Object[])
+ * @see java.lang.Class#getDeclaredConstructor(Object[])
+ * @see java.lang.Class#getConstructors()
+ * @see java.lang.Class#getDeclaredConstructors()
+ * @since 1.1
+ * @status updated to 1.4
+ */
+public final class Constructor
+extends AccessibleObject implements Member
+{
+  private Class clazz;
+  private int slot;
+  
+  /**
+   * This class is uninstantiable except from native code.
+   */
+  private Constructor(Class declaringClass,int slot)
+  {
+    this.clazz = declaringClass;
+    this.slot = slot;
+  }
+
+  private Constructor()
+  {
+  }
+
+  /**
+   * Gets the class that declared this constructor.
+   * @return the class that declared this member
+   */
+  public Class getDeclaringClass()
+  {
+    return clazz;
+  }
+
+  /**
+   * Gets the name of this constructor (the non-qualified name of the class
+   * it was declared in).
+   * @return the name of this constructor
+   */
+  public String getName()
+  {
+    return getDeclaringClass().getName();
+  }
+
+  /**
+   * Gets the modifiers this constructor uses.  Use the <code>Modifier</code>
+   * class to interpret the values. A constructor can only have a subset of the
+   * following modifiers: public, private, protected.
+   *
+   * @return an integer representing the modifiers to this Member
+   * @see Modifier
+   */
+  public native int getModifiers();
+
+  /**
+   * Get the parameter list for this constructor, in declaration order. If the
+   * constructor takes no parameters, returns a 0-length array (not null).
+   *
+   * @return a list of the types of the constructor's parameters
+   */
+  public native Class[] getParameterTypes();
+
+  /**
+   * Get the exception types this constructor says it throws, in no particular
+   * order. If the constructor has no throws clause, returns a 0-length array
+   * (not null).
+   *
+   * @return a list of the types in the constructor's throws clause
+   */
+  public native Class[] getExceptionTypes();
+
+  /**
+   * Compare two objects to see if they are semantically equivalent.
+   * Two Constructors are semantically equivalent if they have the same
+   * declaring class and the same parameter list.  This ignores different
+   * exception clauses, but since you can't create a Method except through the
+   * VM, this is just the == relation.
+   *
+   * @param o the object to compare to
+   * @return <code>true</code> if they are equal; <code>false</code> if not.
+   */
+  public boolean equals(Object o)
+  {
+    if (!(o instanceof Constructor))
+      return false;
+    Constructor that = (Constructor)o; 
+    if (this.getDeclaringClass() != that.getDeclaringClass())
+      return false;
+    if (!Arrays.equals(this.getParameterTypes(), that.getParameterTypes()))
+      return false;
+    return true;
+  }
+
+  /**
+   * Get the hash code for the Constructor. The Constructor hash code is the
+   * hash code of the declaring class's name.
+   *
+   * @return the hash code for the object
+   */
+  public int hashCode()
+  {
+    return getDeclaringClass().getName().hashCode();
+  }
+
+  /**
+   * Get a String representation of the Constructor. A Constructor's String
+   * representation is "&lt;modifier&gt; &lt;classname&gt;(&lt;paramtypes&gt;)
+   * throws &lt;exceptions&gt;", where everything after ')' is omitted if
+   * there are no exceptions.<br> Example:
+   * <code>public java.io.FileInputStream(java.lang.Runnable)
+   * throws java.io.FileNotFoundException</code>
+   *
+   * @return the String representation of the Constructor
+   */
+  public String toString()
+  {
+    // 128 is a reasonable buffer initial size for constructor
+    StringBuffer sb = new StringBuffer(128);
+    Modifier.toString(getModifiers(), sb).append(' ');
+    sb.append(getDeclaringClass().getName()).append('(');
+    Class[] c = getParameterTypes();
+    if (c.length > 0)
+      {
+        sb.append(c[0].getName());
+        for (int i = 1; i < c.length; i++)
+          sb.append(',').append(c[i].getName());
+      }
+    sb.append(')');
+    c = getExceptionTypes();
+    if (c.length > 0)
+      {
+        sb.append(" throws ").append(c[0].getName());
+        for (int i = 1; i < c.length; i++)
+          sb.append(',').append(c[i].getName());
+      }
+    return sb.toString();
+  }
+ 
+  /**
+   * Create a new instance by invoking the constructor. Arguments are
+   * automatically unwrapped and widened, if needed.<p>
+   *
+   * If this class is abstract, you will get an
+   * <code>InstantiationException</code>. If the constructor takes 0
+   * arguments, you may use null or a 0-length array for <code>args</code>.<p>
+   *
+   * If this Constructor enforces access control, your runtime context is
+   * evaluated, and you may have an <code>IllegalAccessException</code> if
+   * you could not create this object in similar compiled code. If the class
+   * is uninitialized, you trigger class initialization, which may end in a
+   * <code>ExceptionInInitializerError</code>.<p>
+   *
+   * Then, the constructor is invoked. If it completes normally, the return
+   * value will be the new object. If it completes abruptly, the exception is
+   * wrapped in an <code>InvocationTargetException</code>.
+   *
+   * @param args the arguments to the constructor
+   * @return the newly created object
+   * @throws IllegalAccessException if the constructor could not normally be
+   *         called by the Java code (i.e. it is not public)
+   * @throws IllegalArgumentException if the number of arguments is incorrect;
+   *         or if the arguments types are wrong even with a widening
+   *         conversion
+   * @throws InstantiationException if the class is abstract
+   * @throws InvocationTargetException if the constructor throws an exception
+   * @throws ExceptionInInitializerError if construction triggered class
+   *         initialization, which then failed
+   */
+  public Object newInstance(Object args[])
+    throws InstantiationException, IllegalAccessException,
+           InvocationTargetException
+  {
+    return constructNative(args, clazz, slot);
+  }
+
+  private native Object constructNative(Object[] args, Class declaringClass,
+                                        int slot)
+    throws InstantiationException, IllegalAccessException,
+           InvocationTargetException;
+}